`Sin^2 52 1/2 - Sin^2 22 1/2=`

sin^2 52 1/2^@-cos^2 7 1/2^@

Find the value of sin^(2)82 1/2-sin^(2)22 1/2 .

Find the value of cos^(2)52(1^@)/(2) - sin^(2)22 (1^@)/2

Find the value of cos^(2)112 1/2-sin^(2)52 1/2 .

If cos^(2)52(1)/(2)-sin^(2)22(1)/(2) = (alpha-sqrt(beta))/(gamma sqrt(delta)) then value of (alpha+beta)/(gamma+delta)

Show that sin^2 52^@ + sin^2 38^@=1

cos ^ (2) 52 ((1) / (2)) ^ (@) - sin ^ (2) 22 ((1) / (2)) ^ (@) =

The value of sin ( 67 (1_@)/2 ) sin ( 22 (1_@)/2) is

(sin^2 22^@ + sin^2 68^@ + cot^2 68^@) equals___